- Title
- Fish predation regimes modify benthic diatom community structures: experimental evidence from an in situ mesocosm study
- Creator
- Wasserman, Ryan J
- Creator
- Vink, Tim J F
- Creator
- Dalu, Tatenda
- Creator
- Froneman, P William
- Date Issued
- 2015
- Date
- 2015
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/68052
- Identifier
- vital:29190
- Identifier
- https://doi.org/10.1111/aec.12255
- Description
- Publisher version
- Description
- Diatoms are important primary producers in shallow water environments. Few studies have assessed the importance of biological interactions in structuring these communities. In the present study, benthic diatom community structure in relation to manipulated food webs was assessed using in situ mesocosms, whereby predator-free environments and environments comprising two different fish species were assessed. Zooplankton abundance, settled algal biomass and the diatom community were monitored over a 12‐day period across each of the three trophic scenarios. Differences among treatments over time were observed in zooplankton abundances, particularly copepods. Similarly, the benthic diatom community structure changed significantly over time across the three trophic treatments. However, no differences in total algal biomass were found among treatments. This was likely the result of non‐diatom phytoplankton contributions. We propose that the benthic diatom community structure within the mesocosms was influenced by trophic cascades and potentially through direct consumption by the fish. The study highlights that not only are organisms at the base of the food web affected by predators at the top of the food web, but that predator identity is potentially an important consideration for predator–prey interaction outcomes with consequences for multiple trophic levels.
- Format
- 10 pages
- Format
- Publisher
- Ecological Society of Australia
- Language
- English
- Relation
- Austral Ecology
- Relation
- Wasserman, R. J., Vink, T. J., Dalu, T. and Froneman, P. W. (2015), Fish predation regimes modify benthic diatom community structures: experimental evidence from an in situ mesocosm study. Austral Ecology, 40: 806-815. doi:10.1111/aec.12255
- Relation
- Austral Ecology volume 40 number 7 806 815 2015 1442-9985
- Rights
- Ecological Society of Australia
- Rights
- Use of this resource is governed by the terms and conditions of the National Library of South Africa Copyright Act (http://www.nlsa.ac.za/downloads/Copyright Act.pdf)
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Collections
Froneman, Pierre William (Prof)
Wasserman, Ryan J (Assoc Prof)
RU Department of Zoology and Entomology
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